Lots of LADA (adult onset) are here. "Type 1.5" is not an actual designation -- it is more like a way for people to try and explain why they didn't have near-immediate loss of pancreatic beta cell function, as is seen with many children. Some are claiming that there's some kind of cutoff between children below 10 or so, and every other Type 1, but there's little evidence to prove that. There does tend to be a difference between the time to absolutely needing insulin in many people who are older. The "honeymoon" period could be weeks or months in children and young teens, and could be years or a decade or more in adults. Doctors don't test for antibodies if there's no reason to think of autoimmunity, hence the word "Latent" (or hidden).

Since you do have autoimmunity already, it is possible to have Type 1 as well -- I'm so sorry either way. There are 5 autoantibody tests, and they can also test for C-peptide output. Mine took 6 years from when I first showed fasting at 105 mg/dL to when I got a doctor to take me seriously after I randomly tested at over 300 mg/dL. I still have some insulin output after 10 years, but it declines more and more as the years go by and as I have more difficulty keeping my glucose to stay under 100 mg/dL for various reasons. You have been in the 200s and 300s and you have not been on medication yet? You are losing weight and you glucose is higher and higher and you have autoimmune disorders -- and your endo gives you Semaglutide / Ozempeic? I mean, we can't know what's going on, but you do seem a candidate for introducing low-dose insulin injections. Ozempic is designed to stimulate the pancreas of a Type 2 diabetic into releasing more insulin. If you are Type 1, you have insufficient insulin producing cells -- so that's not the right solution. And may cause faster "burnout" of your remaining cells, if so.

Call you endo today and insist on being tested for autoantibodies for Type 1 diabetes -- because you deserve a proper diagnosis so that you can get proper medicine and have healthier blood glucose levels. You have every reason to suspect, as laid out above, not the least of which is other autoimmune conditions.